BLEPHAROPLASTY BY VARIOUS CAUSES

심미적인 이유를 포함한 여러 가지 원인에 의한 안검성형술을 저자등이 사용한 방법, 안검성형술을 받고자 하는 동기, 합병증 등을 보고하며 국내의 턱얼굴외과의사들의 새로운 진료 영역으로의 안면부 연조직미용수술에 관한 관심과 노력을 기대한다

INTERNAL VS. RIGID EXTERNAL DISTRACTION DEVICE FOR THE MAXILLARY HYPOPLASIA OF CLEFT PATIENTS

Distraction osteogenesis for the advancement of hypoplastic maxilla of cleft patients has shown successful results. In this report, rigid external distraction(RED) system and internal distraction device were used for maxillary advancement. Each system has its advantages and disadvantages. Larger amount of advancement can be achieved with RED system. But complex external device may give patients psychological stress. Internal device is invisible. However its distraction amount have limitation for the advancement (< 20mm) and the vector cannot be changed freely during distraction. The authors treated five cleft patients with maxillary hypoplasia(three with RED system and two with internal distractor). Their results were clinically satisfactory. We present the pros and cons of RED and internal system for maxillary distraction osteogenesis

FALSE ANEURYSM IN INTERNAL MAXILLARY ARTERY

구강악안면 영역에서의 외상에 의한 내악 동맥의 가성 동맥류는 극히 드문 병변으로 저자들은 서울 대학교 치과병원 구강악안면외과에서 1례를 치험하였다. 그 원인은 외상에 의한 하악 과두 골절, 관혈적 정복술시의 의원적 외상 또는 둘 다를 고려해 볼 수 있었으며 임상적으로 박동성 잡음,촉진 가능한 맥동이 있었고 술중 과다 출혈의 양상을 보였다. 병소는 혈관 조영술에 의해 확진되었으며, 색전술로 치료하였다. 가성 동맥류는 생명을 위협할 정도의 과다 출혈을 일으킬 수 있으므로 그 진단과 치료는 중요하다. 혈관 조영술은 임상적 증상에 대한 확실한 진단을 가능케 해 주며 이를 이용한 색전술은 관혈적 결찰법에 비해 장점을 가지므로 좋은 치료법이 될 수 있다.보건복지부 보건의료기술진흥사

Development of a Biphasic Electrical Current Stimulator for Enhancing Early Bone formation in Dental Implant

In dental implant, early bone formation of surrounding implant surface has long been key technology to increase success rate. In this study, in order to enhance bone formation, we stimulated biphasic electrical current with 20μ A/cm2 through temporary healing abutment to a surrounding bone tissues. Developed small sized biphasic electrical current stimulator was integrated in temporary healing abutment with power source and the device was applied for 7 days in early stage of osseointegration in animal experiments.본 연구는 보건복지부 과제 (A040028(0405-E000- 0301-0007)와 과학기술 부/한국과학재단 우수연구센터 육성사업의 지원으 로 수행되었습니다(R11-2000-075-01001-0). 제 작된 chip은 IDEC MPW 프로그램과 (주) 삼성전 자의 지원에 의해 제작되었습니다

An Electronic System IC for Enhancing Bone Formation in Dental Implant

This paper presents an electronic device for enhancing osseointegration of surrounding tissues in dental implant. Early bone formation between implant surface and surrounding tissue is very important to shorten period of treatment as well as decrease failure rate of implant surgery. In order to accelerate bone formation, we designed a biphasic electrical current (BEC) stimulator IC, having parameters of 20uA/cm2, 120us-duration and 100 pulses per second. It was integrated with micro-batteries in temporary healing abutment and the system operated for 7 days with continuous BEC stimulation in animal tests. The results of animal tests show that the proposed electronic system expends the osseointegration of the implant surface by 1.69-fold more than that of the controls. Based on these results, we proposed new electronic system that could be applied to accelerate bone formation in dental implant. These technologies also can be used to the patient with osteoporosis.본 연구는 보건복지부 과제(A040028(0405-E000- 0301-0007)와 과학기술부/한국과학재단 우수연구센터 육성사업의 지원으로 수행되었습니다(R11-2000-075- 01001-0). 제작된 chip 은 IDEC MPW 프로그램과 (주) 삼성전자의 지원에 의해 제작되었습니다

PMMA MICROSPHERES (ARTECOLL) INJECTION FOR NASAL RIDGE AUGMENTATION IN THE ORTHOGNATHIC SURGERY

Polymethyl-methacrylate(PMMA; Artecoll) microspheres suspended 1 : 3 in a 3.5% collagen solution has been used as an injectable implant for long lasting correction of wrinkles and minor skin defects. The patients with mandibular prognathism have increased necessity for nasal augmentation. Usually these patients usually get an additional rhinoplasty after orthognathic surgery. The purpose of this study is to evaluate the result of PMMA injection for nasal ridge augmentation simultaneously with the orthognathic surgery. PMMAs were injected to the nasal dorsum of 13 patients with mandibular prognathism to augment the nasal ridge at the end of the orthognathic surgery. The cephalometric X-ray and clinical facial photograph were taken at 2, 4 and 6 months after operation. Using S-N line, we calculated the change of soft tisuue on the nasal ridge and also investigated the degree of patients satisfaction at 6 months after operation. Most of the patients were satisfied with their nasal ridge height status from moderate to good degree. The average amount of nasal ridge augmentation was mm immediately after operation, mm at 2 months after operation. The postoperative nasal ridge height seemed to be remained stable after 2 months. Intraoperative PMMA injection is considered to be simple and effective technique which can be used for the minor augmentation of nasal ridge in the orthognathic patients

Nasoanthropometric Study After Open Rhinoplasty

1. Introduction : 개방형 비성형술은 직접적인 비소주에 대한 접근으로 진단과 기술상의 장점으로 인하여 과거 수년간 의심의 여지 없이 사용되었으며 또한 비익 연골을 쉽게 사용할 수 있어서 대부분의 경우에 사용되어져 왔다. 그러나 비개방형에 비해 개방형 비성형술의 경우 콧구멍과 비첨부의 비대칭 및 비익부의 길어짐 등의 불만을 호소하는 경우가 많았다. 그러나 개방형 비성형술의 경우 아직도 접근의 용이성 및 대칭성으로 많이 사용되고 있다. 2. Material & Methods : 이에 서울대학교 구강악안면외과에서 1999년부터 2001년까지 개방형 성형술을 시행 받은 환자를 대상으로 술후에 비익과 비첨부의 대칭 및 비공의 크기 정도를 평가해보고 개방형 비성형술의 좋은 결과에 대해 논해보고자 하였다. 3. Resulo : 술 후 환자의 만족도는 높은 편이었으나 양측의 대칭 정도에서는 조금씩 차이를 보여 비첨은 대개 이환측으로 변위되어 있었으며 비공의 크기에서도조금씩 차이를 나타내었다. 4. Conclusion : 지금까지는 주로 비순부의 평균치나 성장 방향을 연구하는데 주로 계측치들이 이용되었던 반면, 수술 후 일어날 수 있는 비부의 변화앙상을 나타내는 데에는 부족한 점이 많았고 특히 구순 구개열 환자에서 연령, 성별에 따른 표준자료의 부족으로 형태학적인 비교 연구 및 표준자료가 부족하였다. 따라서 이번 연구에서는 구순 구개열 환자의 술 전 및 술 후 의 변화 양상을 파악하는데 도움이 될 만한 차트를 만들었고 변화양상을 연구하는데 도움이 될만한 자료를 제시하는 바이다

The Three Dimensional Analysis of Volumetric Airway Change In Orthognathic Surgery of Mandibular Prognathism

Orthognathic surgery changes patient's mandibular position and environment of related anatomic structures. Many clinicians were interested in these changes and studied about this problem. However, most of them were based on two dimensional cephalogram. According to the development of image and computer system, it would be possible that the airway change is analyzed with three dimensional CT. So we tried to measure the volumetric change of airway and analyzed the relationship between the airway structure and volumetric change. Nineteen patients who experienced orthognathic surgery due to mandibular prognathism were analyzed with 3D CT data (preoperative and postoperative 6 months) and 2D lateral cephalometry. Volumetric change was measured and 3 dimensional change of related structure was assessed with simulation program (V-works®, 4.0 Cybermed, Korea). Ten patients showed the decrease of airway volume change and nine showed the increase of airway volume change. Volumetric change was determined by dimensional change of mandible and hyoid bone. The dimensional positions of mandible and hyoid bone were the key factor for determining the airway change after surgery. Airway change is also predictable with the dimensional change of mandible and hyoid bone

The treatment of obstructive sleep apnea patient using extended uvulopalatal flap: a case report

The uvulopalatal flap (UPF) technique is a modification of uvulopalatopharyngoplasty (UPPP) for the surgical treatment of obstructive sleep apnea. In the UPF technique, an uvulopalatal flap is fabricated and sutured to the residual mucosa of the soft palate to expand the antero-posterior dimensions of the oropharyngeal inlet. In the extended uvulopalatal flap (EUPF) technique, an incision at the tonsillar fossa is added to the classical UPF technique followed by the removal of mucosa and submucosal adipose tissue for additional expansion of the lateral dimension. The EUPF technique is more conservative and reversible than UPPP. Therefore, complications, such as velopharyngeal insufficiency, dysphagia, dryness, nasopharyngeal stenosis and postoperative pain, are reduced. In the following case report, the patient was diagnosed with obstructive sleep apnea and treated with the EUPF technique. The patients total respiratory disturbance events per hour (RDI) was decreased to 15.4, the O2 saturation during the sleep was increased,and the excessive daytime sleepiness had disappeared after the surgery without complications. The authors report this case with a review of the relevant literature.N

AMELOBLASTOMA OF THE MAXILLA: CLINICAL STUDY

Ameloblastoma of the maxilla is an unusual epithelial tumor of odontogenic origin. According to many authors and reports, ameloblastoma account for approximately 1% of all tumors of the jaws, but when pseudotumors and cysts are excluded, the ratio rises to 11%. Of these tumors,80% originate in the mandible, while 20% originate in the maxilla. Although it is considered benign histopathologically, it can behave in a slowly growing infiltrative fashion, with multiple recurrences and eventual intracranial, or even distant, spread. We clinically analyzed common site in maxilla, radiographic findings, recurrence rate, duration between treatment and recurrence, the presence and site of distant metastasis in 15 patients who were diagnosed as ameloblastoma of the maxilla and took treatments from 1985 to 1999 in Dept. of Oral and Maxillofacial Surgery, Dental Hospital, Seoul National University. In this paper, treatment outcomes and our clinical experiences of maxillary ameloblastoma are reported with review of literatures.본 연구는 2002년도 보건복지부 보건의료기술 개발사업 중점공동연구지원비(02-PJ1-PG1-CH07-0001)의 지원을 일부 받았